298 EDWARD W. BERRY 



these Interglacial periods that we find the fossil remains of the 

 Judas-tree. Both the American and the European Judas-tree 

 were already in existence. The former has been found in North 

 Carolina and in the Don River valley in Ontario. The latter is 

 rather common throughout France as far north as the site of 

 Paris, and at a number of localities in Italy. Both the American 

 and the European Judas trees frequently depart from the normal 

 orbicular or cordate shape of the leaf, widening them and de- 

 veloping an emarginate apex. This may be an atavistic trait, 

 since several of the ancestral fonns appear to have normally had 

 leaves of this shape. 



